I think the grapefruit industry has played a big fat trick on us drug addicts man. Damn you Dole! I totally understand the process and mechanism behind all of this and even acknowledge its truth, but the difference comes mainly like this: does it actually change our experience to such an extenet that going to the store and buying a grapefruit or grapefruit juice every time you use drugs has a real point, I think not.
Like how there are an infinite number of potential points between two points, I believe that this experiment didn't necessarily register some kind of major change, but may have just registered some kind of verifiable change that may have registered on their instruments but would otherwise be too blunt for us to really comprehend.